- This topic has 34 replies, 12 voices, and was last updated 1 month, 3 weeks ago by
.
-
Posts
-
-
Have been trying different amplifiers to drive my M1s – a couple of McIntosh solid states and I ordered in a D-Sonic Class D
Short story on the D-Sonic is that if I’d not heard the Macs first, I probably would have kept it. Lots of power for the price (800 watts 8 ohms $2000; 1500 watts for <$2500). My short take is it’s sort of “in your face.” I think we need to keep an eye on Class D amps, tho.
Had some email traffic with Roger West asking about Class D and SLs. He doesn’t like them in general; thinks they aren’t engaging. Told me he thinks they will continue to improve, tho. Roger listens to two ABH2s. He used them as monoblocks. Spoke very highly of them. Says their frequency response is flat even at full power.
Started looking on Hifishark for used ABH2s and, like Sound Lab speakers, they don’t show up very often; which I think says something about them.
-
I’ve owned 3-SoundLab pairs, obviously at different times.
Frist, I had Millennium-1’s and then M1-PX’s with the consummate backplates and currently, Majestic 845’s.
I drove my original Millennium-1’s with a Mark Levinson 336 stereo amplifier. At that time and on the old SLOG forum, many were using tube amps, especially Wolcott’s and Atma-sphere’s. Thus, I wanted to try a tube amp and see what all the fuss was about.
A local dealer had a used pair of CAT (Convergent Audio Technology) JL1 monoblocks – 100W/Ch. Those weighed in at just under 400lbs. Along with the CAT’s, the dealer had an audition pair of Parasound Halo JC1 monoblocks. I took both the CAT’s and Parasound’s home. I first inserted the Parasound’s. At less cost than my Levinson, the JC1’s were very similar to the Levinson 336. When I inserted the CAT’s, I was immediately bowled over. The CAT’s controlled the SoundLabs unlike the two solid state amps. Bass was better, SoundLab’s superb midrange was even better and the treble was great. I then thought what am I missing? The answer was nothing was missing! Everything I value was better, soundstage, harmonics, imaging, drive and control etc.
A few years later, I had the opportunity to obtain CAT JL3’s with double the output tubes and 50 more watts/channel than my original JL1 CAT’s. They were better with my then Millennium SoundLabs in terms of a marginal higher output. But the overall sound was very similar between the 2-amps. With PX panels and the newest backplate’s, I’m sure JL1’s would now be sufficient.
However, after developing significant spine and hip issues, the CAT’s became problematic. Because CAT’s owner Ken Stevens strives for utmost excellence, he chose to forego using actual fuses. Instead, he installed sacrificial resistors at each tube socket – 16 for the JL1’s and 32 for the JL3’s. I had several resistors blow while I owned the CAT’s. Each time, the 190lb. amps had to be flipped over on their tops and their bottom plate’s many screws removed. The blown resistor then needed to be de-soldered and a new one re-soldered. Not a terrible process for someone with a soldering iron and the physical capabilities to perform the function. But the process became one I could no longer perform.
At 37lbs. each, robust and fused, I thought that the Atma-sphere MA1’s may be a good alternative to the CAT’s. My local dealer brought the MA1’s out for an in-home audition, along with Levinson and Pass Labs amps. The Pass was an A/B amp, at I believe 250-watts. Sonically, it wasn’t at all what I was used to. The Levinson was also around 250-watts and its protection circuits kicked-in. So, I didn’t get to hear much of it. But when the Atma-sphere’s were inserted, I had reproduction similar to my CAT’s. They may have a bit less bass wise, but they had a bit more detail (which was good) than the CAT’s. But the harmonics, imagining, soundstage and control were similar to the CAT’s. Hence, I chose to buy a new pair of MA1’s. I had no more sacrificial resistor concerns and no worries about repairing, lifting and moving 190lb. amplifiers. To the CAT’s credit however, much of the 190lbs. is due to CAT’s 55lb. proprietary transformers. My belief is that CAT push/pull amps (with a midrange SET purity) owe much of their superb capabilities to their proprietary transformers. As such, CAT’s are a supreme match for SoundLabs. And as you can tell, I hated to part with them. They’re that good with SoundLabs and I understand with many other speakers. In fact, I would imagine that CAT’s newer JL5 stereo amps would be a great match with S/L’s.
With that said, many solid-state amplifiers of sufficient power will drive the SoundLabs well. I thought my Levinson and then the Parasound Halo’s did well, until I heard the CAT’s and tubes. At that point, everything was better. Bass was better and harmonics were better and as such, symphonic instruments sounded more like the real thing. Thus, with the CAT’s and Atma-sphere’s, I prefer tubes. If I never heard the difference, I would have been quite satisfied with the solid-state amplifiers I owned and tried. However, if you have a chance to audition CAT’s or Atma-sphere’s, you may well hear the plusses that prompted me to stick with these tube amplifiers.
As a matter of fact, because of my physical limitations which even impact tube changing and rolling, I would like to find solid state amps that would equal the Atma-sphere’s. Forum member “ACHiPo” does own Atma-sphere’s and Benchmarks. He has made a comparison between the two.
However, I would love to hear from other folks who have had the opportunity to compare Atma-sphere’s with for example: Pass A/B and Class A amps as well as other solid-state Class A/B, D & H amps.
Some who run their system many hours per day, may choose solid state because of tube replacement issues. And although heat is not a problem with my Midwest, basement audio room, I can understand why some may have chosen solid state. But of supreme importance to me is not heat or tube maintenance, but the end result – i.e., from a purely sonic perspective, what solid-state amp will equal CAT or Atma-sphere tubes? If I move to solid state amps, I would like to do so laterally sound wise and not regret the move.
-
-
-
Late to the party but I can tell you that an Ncore amp is not a good match for my U-1s. It is a 300 watt/channel NC502mp purchased for the garage system driving New Advents, but I decided to try it out with the stats.
It was not happy. Grainy top end and a weird lack of center fill. I’m thinking it does not do well with reactive loads.
-
I am a long-time Sound Lab speaker owner and haven’t checked for this site for a while.
Personally, I don’t like Class D amps. Its sound is dry and lacks liquidity. I understand today’s Class D amp may not be the same as it was. A while ago, tried a Spectron Musician III to drive my Majestic 945 alone and disliked the sound. Finally, I biamped the Majestic 945. The Spectron Musician drives the bass and a pair of Wolcott P400 for the high/mid. It is the right mixture for me.
-
@mossimo
The Benchmark AHB2 amps are very good, especially for the money and in hot weather! I still preferred the MA1s by a small margin with my old front end and expect the difference to be even bigger with the new Taiko Extreme server and Technics SP10R and Kuzma tonearm.The Benchmark dynamics are superior to the AtmaSphere, but the midrange liquidity, air, and 3 dimensionality of the AtmaSpheres are slightly superior to the Benchmarks.
Evan -
-
Regarding my last post, I erroneously inferred and believed that the Benchmark AHB-2 was a Class D amp, when it isn’t. In fact, Benchmark’s specs state it: “combines class-AB, and class-H topologies, using a feed-forward error correction system” (https://benchmarkmedia.com/products/benchmark-ahb2-power-amplifier). And ACHiPo (Evan), is using two AHB-2’s that are in bridged mode to output enough power for his SoundLabs. -Mike
-
Although I have had personal communications with ACHiPo about Class D amps and his experience with the Benchmark AHB-2’s, I wanted to thank him here, for bringing Class D amps to the SLOG gang’s attention.
SoundLab’s and Class D amplifiers used together, hadn’t entered my mind until this thread. Although they have been around for years, for the cost, power consumption and weight, Class D amplifiers seem to now have entered into the high-end world with a fairly recent and big splash.
If anyone has any experiences using Class D amps with SoundLab’s, please let the group know.
Because of an electrostatic speaker’s amplification needs vs cones and domes, amplifiers have always been a hot discussion topic amongst us SoundLab owners. As such, I always appreciate amplifier discussions. This is especially true regarding everyone’s personal experiences with different amplifier brands, types, power-output etc. So, by all means give us all a shout-out regarding your amp experiences and comparisons, good bad, or otherwise…
-
-
Massimo,
Sorry I can’t comment on the Bel Canto amps other than to say I was convinced based on reviews to give it a try if I thought it would be a good match with the Sound Labs (I did not have them in my system nor have I heard them in another system). Let me know if you’re interested and I will PM you a link with the ad. The seller is in Michigan (not sure where you’re located?)Evan
-
-
Well after toying with picking up a pair of used Bel Canto Ref600M class D amps, I decided to pull the trigger on a pair of Benchmark AHB2 amps. It’s not too clear what the topology is–Class H–but good words from Roger and myriad great reviews and a 30 day demo period got me over the hump.
I’ll post my impressions when I get them.
-
-
-
Interesting development. I knew Ralph was working on a class D. Looks like it’s ready.
https://www.audiocircle.com/index.php?topic=180725.0;topicseen -
I drove my U-3’s (updated toroids and PX panels) with Wolcott mono blocks for years. They worked very well. Plenty of punch, great highs, open mids, wide and deep soundstage. Last year I replaced them with the PS Audio M1200 Class D monoblocks. The M1200’s were better in every category. The timbral accuracy of all instruments, attack/sustain/decay ,micro dynamics, and ambience retrieval were immediately noticeable improvements right out of the box. After 200+ hours, they still were getting better. Darren Meyers knows what he’s doing to make those ICE modules sing.
-
I definitely read that review, but forgot about the Merrill amp reference. Thanks. I reread it, and think that might have been what planted the seed in my head that Class D could be a good match with Sound Labs.
I tried the W4S again after more break in and it still sounds good, just not as juicy and enveloping as the AtmaSpheres.
I’m hearing good things about Benchmark with Sound Labs, so may give them a shot down the road just out of curiosity.
-
Guy’s I am surprised you missed this review of the Majestic 845PX in the May of 2014 edition of Enjoy The Music. Jules Coleman wrote the review and gave a thorough, interesting and glowing account of the speakers attributes.
But what was interesting is the amplifier that he settled on after trying a
Pass Labs A-250 which could not adequately drive the speaker. He chose the
Merrill Veritas Monoblocks which are Class D, produce 400 watts into 8 ohms
and had no trouble driving the big panels. The Veritas have a pretty good reputation in the Audio community and right now they are selling at very
reasonable prices used, they listed new at 12k.One thing of note, while writing the review and listening to music at the same time he did not want to turn his head and spoil the illusion that this was not live music but a reproduction as gloriously presented by the Sound Lab speaker. As owners we know what he was talking about.
-
-
Ciao Massimo!
The Wyred4Sound amp is amazing for the price—I paid about $800 used for it a few years ago. It is detailed and powerful. It has a little more glare than my MA1s, and much less emotional delivery, but I could definitely live with it for the Summer months. I’m sure there are better Class D amps now—the W4S uses a Beolab ICE module amp with a custom input and power supply. Given its performance, however, I don’t think I’ll be trying the Benchmark unless I find a great deal.Evan
-
Hi ACHiPo,
I am glad that your W4S ST500 can drive your new 645s!
Just like you, I am also looking for a second ‘summer amplifier’.
What do you think is a top tier Class D amp?
I would like to read more of your listening impressions regarding MA1s vs. ST500.Best regards
MassimoP.S.: I am considering this ‘top tier’ Wyred4Sound. Unfortunately no dealers in Vienna 🙁
-
I received my Sound Lab speakers yesterday and got them set up today. I listened for several hours with AtmaSphere MA1s and things sounded quite good. I switched to my Wyred4Sound ST500 amp (250 wpc Class D), and things sound quite good–different, but good. The room is a LOT cooler. Will continue running the Class D whenever not critically listening to break in the speakers. Given the performance of this relatively modest Class D, I’m thinking a top tier Class D would sound pretty darned good on Sound Labs.
-
Well, I have the Wyred4Sound Class D. I’ll likely use it to break in the Sound Labs. Will give it a listen, too, just to compare it to the MA-1s.
Meanwhile I’ve got my eyes peeled for a Benchmark or 2. So far the only used ones I’m finding are very close to new in pricing.
-
ACHiPo said: “I also ordered the MA-1s.” “I’ll keep my eyes peeled for a used Benchmark or 2 as it might be nice to have a low-heat option to drive the SLs in the summer!”
I wasn’t going to say so, but now that you have, MA-1’s do indeed add some much welcomed warmth during my midwest winters. Because you already own the M-60’s, you have a clue. However, I can’t imagine the space heater warmth that the MA-2’s must emanate (grin). Then there are the MA-3’s. When firing them up, it must be campfire story and marshmallow roasting time 🙂
-
Benchmark AHB2 Power Amplifier: interesting technology, great price! Thanks for heads-up and the link.
If someone tries one, especially ACHiPo in comparison to your Atma-sphere MA-1’s, please give us a shout out. The 100-watts would seem to be marginal and as such questionable. However, numbers can be misleading. Especially when comparing the more usual Class AB vs A circuits.
At any rate, hearing (particularly with SoundLabs) is believing! I rule nothing OUT, or for that matter IN based on specifications, technology, part types, topography, etc., without hearing. In our wacky hobby, I’ve been surprised both positively and negatively too many times to believe otherwise.
-
-
-
Yes Tom’s city system. I was very impressed by the (big speaker-sized) diminutive 545s. They ran out of gas (bass flapping) but at SPLs much higher than I normally listen (or even comfortable). Tom’s room is quite a bit liver than mine, so I think the 645s will sound fantastic (at least I hope so!)
I also ordered the MA-1s. I’ll keep my eyes peeled for a used Benchmark or 2 as it might be nice to have a low-heat option to drive the SLs in the summer!
No new car for me for a few years!
-
TWBs city system, i’m guessing?
I know lots of people like tube amps, and i would love to hear the highly acclaimed Atmaphere’s in my system. I haven’t really heard tubes that i preferred over SS, though i will admit to recently hearing Stax 009s through an LTA Z10e and it is the best i’ve heard an electrostatic headphone to date, this system also sounded excellent powering the original Abyss 1266, which is the first headphone that i heard that i thought sounded better than my Quad system at the time. I may even like the Z10e better than my diy Gilmore designed Dynahi. -
I’d like to hear them as well. Ultimately I decided to pull the trigger on AtmaSphere MA1s as I’ve grown accustomed to the AtmaSphere sound and from what I read they are an outstanding pairing with Sound Labs.
I heard 545s Sunday with Pass Labs 250.8s and they sounded very good. I’m hoping 645s driven by the MA1s will be at least as good in my room.
I have a spare 500WPC Wyred4Sound Class D stereo amp that I will use to break in the Sound Labs. I used it when I sent my M60s back to Ralph for refurb and it sounded really good on my Kefs. Not as good as the AtmaSpheres, but better than I expected from an $800 used amp.
-
-
Update: Roger suggested I check out the Benchmark AHB amps and they have glowing reviews. I’ve found some positive statements on driving Martin Logan speakers, but nothing on Sound Lab. Has anyone heard or had experience with these amps on Sound Labs?
Benchmark AHB2 Power Amplifier -
There are some very good sounding Class D amps these days. I’m wondering how Class D amps would work with the electrostat load of the PX Sound Lab speakers?
There are lists of good and not-so-good amps for Sound Labs, but I haven’t seen anything that says what it is about an amp that makes it a good match for Sound Lab speakers? AtmaSphere OTLs seem to handle the impedance curve well, as do Pass Labs (and I’ve heard Boulder and probably Dartzeel and Jeff Rowland Class A/B as well?) What is it about those amps (other than adequate power) that makes them a good match?
-
- You must be logged in to reply to this topic.